Valve



Sept. 8, 1931. J. R. HAMILTON VALVE Original Filed March 7, 1927 l I anV M W H A M U is mic/mugs Patented Sept. 8, 1931 UNITED: STATES PATENTOFFICE JOHN B. HAMILTON, OF CLEVELAND, OHIO, ASSIGNORTO AUTOTVIATICSPRINKLER COM- PANY OF AMERICA, OF CLEVELAND, OHIO, A CORPORATION OFDELAWARE VALVE I Original application fiIed Manch 7, 1927, Serial No.173,232. Divided and this application filed January 3,

' 1928. Serial This invention relates to valves and more particularly towater valves for sprinkler systems. The present application is adivision of my earlier application Ser. N01 173,232, filed March 7th,1927. I

One of the objects of the present invention is to provide an improvedform of automatically operating water valve having a pilot valveassociated therewith and which will be capable of accurate adjustment toavoid objectionable lost motion in the parts, so as to insure that theopening of the pilot valve will occur upon the initial movement of thewater valve.

Another object of the invention isto provide a valve mechanism, of theclapper type, inwhich the valve pivot is so arranged that there will beno lost motion and no liability for the valve pivot to become frozen,due to corrosion or the deposit of sediment in the bearings thereof.

A. further object of the invention is to provide a valve of the clappertype in which the valve disc is universally adjustable with respect tothe arm on which it is carried,

so as to insure proper registration with the valve seat.

Other objects of the invention and the features of novelty will beapparent from the following description taken in connection with theaccompanying drawings, of which Fig. 1 is a longitudinal section througha water valve, for sprinkler systems, embodying my invention; A

Fig. 2 is a transverse section on the line 22 of Fig. 1; and V Fig. 3 isan enlarged section on the line Referring to the drawings, '16 indicatesthe casing of an automatically opening water valve especially adaptedfor use in connection with automatic dry-pipe sprinkler systems. A valveseat 17 "is arranged in the casing 16 and a clapper valve 18 cooperateswith the seat 17. The valve 18 has a lug 19 on its upper surface whichprojects through an opening 20 in an arm 21, there being a pivot pin 22for loosely connecting the lug 19' to the arm 21 so that the valve 18may be swung 'on the pivot 22 for the purpose of properly aligning thevalve with the seat 17 The arm 21'carries a plurality of set screws 23,preferably three in number, which are symmetrically arranged to engagethe upper surface of the valve18, on opposite'sides of the pivot 22 andrigidly securethe valve to the arm 21. The set screws 23 may be lockedin any position to which they are adjusted by means of, the nuts 24.

The arm 21 is loosely mounted on a pivot pin 25 that is mounted in thecasing 16, the ends of the pin 25 being arranged 'in'the bushings 26that are rigidly held in the casing, and the openings through thesebushings being considerably larger than the diameter of the pin 25 sothat there will be no likelihood of the pin becoming frozen in thebushings due to the accumulation of corrosion or other foreignsubstances. The arm 21 is provided with aligned ears 27 in which thereare bushings 28, the internal diameter of these bushingsbeing-materially larger than the diameter of; the pin25 so that the pinwill be perfectly free at all times in the bushings. A spring 29 iscoiled around the middle portion of the pin 25 and has one end 30 inengagement with theinner surface of the casing 16 and the other. end 31engaging with the upper surface of the arm 21. The spring 29 is sotensioned that it holds the pin 25 in contact with the upperpart of thebores of the bushings 26 (see Fig. 3). By proper adjustment of thescrews 23, the arm 21 is so'positioned, when the'valve 18 is seated,that the lower sides of the bores of the bushings 28 are in contact withthe pin 25. By this arrangement, the pin 25 is normally in eccentricrelation to all of the bushings 26 and 28 and there isno lost motionbetween the arm 21 and the pin 25 when the valve 18 is lifted from itsseat. The purpose and advantage of this arrangement will, be hereinafterset forth. i

A sleeve 32 is firmly secured in the upper end of the arm 21 and a cap33 is screwed into the upper end of this sleeve. A valve 34 is looselyarranged within the sleeve '32'and has a guiding stem 35 which projectsthrough I the cap 33. The valve 34' comprises a disc 36 which cooperateswith the upper end of signature.

JOHN R. HAMILTON.

